firefox is vulnerable to arbitrary code execution. The vulnerability exists as a web page containing malicious content could cause Firefox to crash or, potentially, execute arbitrary code as the user running Firefox.
lists.opensuse.org/opensuse-security-announce/2009-02/msg00001.html
rhn.redhat.com/errata/RHSA-2009-0256.html
secunia.com/advisories/33799
secunia.com/advisories/33809
secunia.com/advisories/33831
secunia.com/advisories/33841
secunia.com/advisories/33846
support.avaya.com/elmodocs2/security/ASA-2009-040.htm
www.mandriva.com/security/advisories?name=MDVSA-2009:044
www.mozilla.org/security/announce/2009/mfsa2009-04.html
www.mozilla.org/security/known-vulnerabilities/firefox30.html#firefox3.0.6
www.redhat.com/security/updates/classification/#critical
www.securityfocus.com/bid/33598
www.securitytracker.com/id?1021666
www.vupen.com/english/advisories/2009/0313
access.redhat.com/errata/RHSA-2009:0256
bugzilla.mozilla.org/show_bug.cgi?id=460425
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9922
www.redhat.com/archives/fedora-package-announce/2009-February/msg00240.html